こんにちは、Beaglebone AI がTIDA-1454から正しく I2S を取得しているかどうかを確認しようとしてarecord test.wavいます。
debian@beaglebone:/etc$ arecord -d 10 ALSA lib pcm_dsnoop.c:638:(snd_pcm_dsnoop_open) スレーブ arecord を開けません: main:828: audio open error: No such file or directory
しかし、次の出力を取得するため、カードが検出されますarecord -l。
**** List of CAPTURE Hardware Devices ****
card 1: PCM5102a [PCM5102a], device 0: davinci-mcasp.0-pcm5102a-hifi pcm5102a-hifi-0 []
Subdevices: 1/1
Subdevice #0: subdevice #0
またはarecord -L:
debian@beaglebone:/var/lib/cloud9$ arecord -L
null
Discard all samples (playback) or generate zero samples (capture)
onboard
onboard_capture_left
onboard_playback_left
onboard_capture_right
onboard_playback_right
plug_onboard_capture_left
plug_onboard_playback_left
default
sysdefault:CARD=PCM5102a
PCM5102a,
Default Audio Device
dmix:CARD=PCM5102a,DEV=0
PCM5102a,
Direct sample mixing device
dsnoop:CARD=PCM5102a,DEV=0
PCM5102a,
Direct sample snooping device
hw:CARD=PCM5102a,DEV=0
PCM5102a,
Direct hardware device without any conversions
plughw:CARD=PCM5102a,DEV=0
PCM5102a,
Hardware device with all software conversions
および ALSA 構成:
pcm.onboard{
type hw
card 0
}
ctl.onboard {
type hw
card 0
}
### Dsnoop splited channels
pcm.onboard_capture_left {
type dsnoop
ipc_key 32
slave {
pcm "onboard"
channels 2
rate 48000
format S32_LE
}
bindings.0 0
}
pcm.onboard_playback_left {
type dmix
ipc_key 33
slave {
pcm "onboard"
channels 2
}
bindings.0 0
}
pcm.onboard_capture_right {
type dsnoop
ipc_key 32
slave {
pcm "onboard"
channels 2
rate 48000
format S32_LE
}
bindings.0 1
}
pcm.onboard_playback_right {
type dmix
ipc_key 33
slave {
pcm "onboard"
channels 2
}
bindings.0 1
}
### PLUGS ##
### used with darkice
### device = plug:plug_onboard_left
pcm.plug_onboard_capture_left{
type plug
slave.pcm "onboard_capture_left"
}
pcm.plug_onboard_playback_left{
type plug
slave.pcm "onboard_playback_left"
}
pcm.!default {
type asym
playback.pcm "plug_onboard_playback_left"
capture.pcm "plug_onboard_capture_left"
}
では、何が問題になるのでしょうか。